China Sdd6a Diesel Locomotive

SDD7 Diesel Locomotive Product Introduction
SDD6A diesel locomotive is developed and manufactured for Angola as passenger, freight and shunting locomotive. It is equipped with Cummins QSK60-L1 diesel engine with maximum service power 1640kW. Main AC-DC transmission is employed with DC and AC transmission for auxiliary system. Two center-plate-less radial bogies with three axles for each and single pull rod for axle box are used. The mechanism of four low-position tractive rods is utilized for transmission of tractive and braking forces. The integral car body is of inside corridor. The braking system is equipped with double-purpose brake of air and vacuum. It is capable of multiple units in consist.
SDD7 Diesel Locomotive Main Parameter
Basic locomotive parameters:

Purposepassenger, freight and shunting locomotive Applicable environmentoperate normally in severe sand, dry, hot and desert areasGage1067mmTransmission modeAC-DC transmissionAxle arrangementCo-CoWheel diameter914mmAxle load16*(1±3%)tCalculating locomotive weight with full service96*(1±3%) tMaximum service power of the engine1640kWLocomotive speed (calculated at 880mm as driving wheel diameter)a) Maximum running speed: 120km/h
b) Continuous speed: 21.3km/hLocomotive tractive effort at wheel rim (calculated at half worn driving wheel as 880mm)a) Starting tractive effort: 314kN (starting current limit)/310kN (adhesion limit)
b) Continuous tractive effort: 189kNFuel tank capacity4000LTotal wheelbase of bogie3600mmLocomotive nominal power774kWCenter line of coupler above rail head889mm±10mm Locomotive length18100mmOil volume281LWater volume500kgSand volume300kg

SDD7 Diesel Locomotive Figure Photos